CI: use sudo, assume docker present, use diff-{quality,cover}, bump EL 7 test to EL 8 as EL 7 is EOL

.coveragerc

@@ -0,0 +1,10 @@
+[run]
+branch = true
+source_pkgs =
+    oz
+
+[paths]
+# this mapping is for the containers; the source tree is in /oz in the containers
+source =
+    oz/
+    /oz/oz

.flake8

@@ -0,0 +1,2 @@
+[flake8]
+max-line-length = 200

.github/workflows/ci.yml

@@ -11,31 +11,31 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Install make and docker
-        run: apt-get install make docker docker.io
+      - name: Install required packages
+        run: sudo apt-get install make flake8 pylint
+      # it's not in Ubuntu 22.04, was added in 23.04
+      - name: Install diff-cover from pip
+        run: pip install diff-cover
       - name: Run the tests
-        run: make container-unittests-fedora
-  unittests-el7:
+        run: sudo make container-unittests-fedora
+      - name: Run diff-cover
+        run: diff-cover coverage.xml  --compare-branch=origin/$GITHUB_BASE_REF --fail-under=90
+      - name: Run diff-quality (pylint)
+        # we want to run this regardless of whether previous lint steps failed
+        if: success() || failure()
+        run: diff-quality --compare-branch=origin/$GITHUB_BASE_REF --violations=pylint --fail-under=90
+      - name: Run diff-quality (flake8)
+        # we want to run this regardless of whether previous lint steps failed
+        if: success() || failure()
+        run: diff-quality --compare-branch=origin/$GITHUB_BASE_REF --violations=flake8 --fail-under=90
+  unittests-el8:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout the repo
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - name: Install make and docker
-        run: apt-get install make docker
+      - name: Install make
+        run: sudo apt-get install make
       - name: Run the tests
-        run: make container-unittests-el7
-  lint:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout the repo
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-      - name: Install make, pylint and flake8
-        run: apt-get install make pylint flake8
-      - name: Run pylint
-        run: make pylint
-      - name: Run flake8
-        run: make flake8
+        run: sudo make container-unittests-el8

.pylintrc

@@ -0,0 +1,25 @@
+[MESSAGES CONTROL]
+disable=C0325,C0103
+
+[REPORTS]
+reports=yes
+
+[TYPECHECK]
+
+[FORMAT]
+max-line-length=200
+max-module-lines=2000
+
+[VARIABLES]
+dummy-variables-rgx=.*_unused$
+
+[BASIC]
+module-rgx=(([a-z_][a-z0-9_]*)|([A-Z][a-zA-Z0-9_]+))$
+
+[DESIGN]
+max-args=20
+max-locals=30
+max-branches=30
+max-statements=100
+max-attributes=30
+min-public-methods=0

Containerfile.tests.el8

@@ -0,0 +1,18 @@
+# this container definition is intended *only* for running the oz test suite, it is not
+# a general-purpose oz container definition!
+
+FROM quay.io/almalinuxorg/8-base:latest
+RUN set -exo pipefail \
+    && dnf install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm \
+    && dnf install -y --setopt install_weak_deps=false --nodocs \
+    python3-requests python3-cryptography python3-setuptools python3-libvirt python3-lxml python3-libguestfs python3-pytest python3-coverage python3-monotonic \
+    libvirt-daemon libvirt-daemon-kvm libvirt-daemon-driver-qemu libvirt-daemon-config-network systemd \
+    && dnf clean all \
+    && rm -rf /var/cache/* /var/log/dnf*
+
+COPY ./ /oz
+# the XML generation tests are inherently unreliable before Python 3.8,
+# as there was no consistent ordering of XML element attributes. See
+# https://docs.python.org/3/library/xml.etree.elementtree.html#xml.etree.ElementTree.tostring
+RUN printf "#!/bin/sh\n/usr/sbin/libvirtd -d\ncd /oz\npython3 -m pytest -vv -k 'not test_xml_generation and not modify_libvirt_xml_for_serial' tests/" > /usr/local/bin/runtests.sh && chmod ugo+x /usr/local/bin/runtests.sh
+CMD /usr/local/bin/runtests.sh

Containerfile.tests.fedora

@@ -4,11 +4,11 @@
 FROM quay.io/fedora/fedora:latest
 RUN set -exo pipefail \
     && dnf install -y --setopt install_weak_deps=false --nodocs \
-    python3-requests python3-cryptography python3-setuptools python3-libvirt python3-lxml python3-libguestfs python3-pytest python3-monotonic \
+    python3-requests python3-cryptography python3-setuptools python3-libvirt python3-lxml python3-libguestfs python3-pytest python3-coverage python3-monotonic \
     libvirt-daemon libvirt-daemon-kvm libvirt-daemon-qemu libvirt-daemon-config-network systemd \
     && dnf clean all \
     && rm -rf /var/cache/* /var/log/dnf*
 
 COPY ./ /oz
-RUN printf "#!/bin/sh\n/usr/sbin/libvirtd -d\ncd /oz\npy.test -vv tests/" > /usr/local/bin/runtests.sh && chmod ugo+x /usr/local/bin/runtests.sh
+RUN printf "#!/bin/sh\n/usr/sbin/libvirtd -d\ncd /oz\npython3 -m coverage run -m pytest -vv tests/\ncoverage xml\ncoverage report" > /usr/local/bin/runtests.sh && chmod ugo+x /usr/local/bin/runtests.sh
 CMD /usr/local/bin/runtests.sh

Makefile

@@ -50,31 +50,32 @@ container-unittests-fedora:
 	docker rm -f oz-tests-fedora
 	docker build -f Containerfile.tests.fedora -t oz-tests-fedora-image .
 	docker run --name oz-tests-fedora oz-tests-fedora-image
+	docker cp oz-tests-fedora:/oz/coverage.xml .
 
-container-unittests-el7:
-	docker rm -f oz-tests-el7
-	docker build -f Containerfile.tests.el7 -t oz-tests-el7-image .
-	docker run --name oz-tests-el7 oz-tests-el7-image
+container-unittests-el8:
+	docker rm -f oz-tests-el8
+	docker build -f Containerfile.tests.el8 -t oz-tests-el8-image .
+	docker run --name oz-tests-el8 oz-tests-el8-image
 
-container-unittests: container-unittests-fedora container-unittests-el7
+container-unittests: container-unittests-fedora container-unittests-el8
 
 test-coverage:
 	python-coverage run --source oz /usr/bin/py.test --verbose tests
 	python-coverage html
 	xdg-open htmlcov/index.html
 
 pylint:
-	pylint --rcfile=pylint.conf oz oz-install oz-customize oz-cleanup-cache oz-generate-icicle
+	pylint oz oz-install oz-customize oz-cleanup-cache oz-generate-icicle
 
 flake8:
-	flake8 --ignore=E501 oz
+	flake8 oz oz-install oz-customize oz-cleanup-cache oz-generate-icicle
 
 container-clean:
 	docker rm -f oz-tests-fedora
-	docker rm -f oz-tests-el7
-	docker image rm -f -i oz-tests-fedora-image oz-tests-el7-image
+	docker rm -f oz-tests-el8
+	docker image rm -f -i oz-tests-fedora-image oz-tests-el8-image
 
 clean:
 	rm -rf MANIFEST build dist usr *~ oz.spec *.pyc oz/*~ oz/*.pyc examples/*~ oz/auto/*~ man/*~ docs/*~ man/*.html $(VENV_DIR) tests/tdl/*~ tests/factory/*~ tests/results.xml htmlcov
 
-.PHONY: sdist oz.spec signed-tarball signed-rpm rpm srpm deb release man2html virtualenv unittests container-unittests-fedora container-unittests-el7 container-unittests tests test-coverage pylint clean container-clean
+.PHONY: sdist oz.spec signed-tarball signed-rpm rpm srpm deb release man2html virtualenv unittests container-unittests-fedora container-unittests-el8 container-unittests tests test-coverage pylint clean container-clean